John Hewitt

Professor Hewitt's work centers on the use of cross-sectional and longitudinal studies of twins and families to study behavioral development, and genetic and environmental influences on behavior, personality, and health. Recent research focuses on the development of behavior problems in childhood and adolescence, vulnerability to drug use, abuse, and dependence, and linkage and association studies of behavioral traits. Dr. Hewitt is Director of the Institute for Behavioral Genetics (http://www.colorado.edu/ibg) and Executive Editor of the journal, Behavior Genetics (http://link.springer.com/journal/10519).

His current research projects include:

• The Center on Antisocial Drug Dependence: http://www.colorado.edu/ibg/human-research-studies/center-antisocial-drug-dependence
• Twin studies of executive functions: http://www.colorado.edu/ibg/human-research-studies/studies-executive-cognitive-functioning
• The Longitudinal Twin Study: http://www.colorado.edu/ibg/human-research-studies/specific-twin-studies/longitudinal-twin-study